Combined-purpose pressure booster pump

ABSTRACT

This disclosure relates fluid moving devices such as pumps and associated components such as to pump casings, pump casing assemblies, and pumps, systems and methods of manufacture and use. In particular, this disclosure relates to combined-purpose devices, such as pump casings and pumps, that can operate as standard centrifugal pumps, booster pumps, and hybrid pumps. The combined-purpose device devices can produce different pressure and flow characteristics that are desirable in, for example, bathing environments.

INCORPORATION BY REFERENCE TO ANY PRIORITY APPLICATIONS

Any and all applications for which a foreign or domestic priority claim is identified in the Application Data Sheet as filed with the present application are hereby incorporated by reference under 37 C.F.R. § 1.57. This application claims the benefit of priority to U.S. provisional application 62/799,656, filed Jan. 31, 2019, the entire contents of which are hereby incorporated by reference.

FIELD

This disclosure relates to fluid moving devices such as pumps and associated components such as pump casings, pump casing assemblies, and systems and methods of manufacture and use. In particular, this disclosure relates to single combined-purpose devices, such as pump casings, pumps, and pumping systems that can operate as standard centrifugal pumps, booster pumps, and hybrid pumps. The devices and systems can produce different pressure and flow characteristics in a fluid.

BACKGROUND

Various pump devices and systems are known for controlling the characteristics of fluid flow and pressure for use in a variety of applications, including bathing.

Standard centrifugal pumps are often used for supplying fluids at a relatively high flow rate and low pressure in a variety of applications. For example, standard centrifugal pumps can be used to operate what is commonly referred to as whirlpool jets in bathing systems. In a bathing system, a standard centrifugal pump can supply fluid that exits an enclosed chamber or pipe at a rapid flow rate and low pressure.

Booster pumps can be used to supply a fluid at a relatively low flow rate and high pressure in a variety of applications. For example, booster pumps can be used to produce pressures and flow rates that are desirable and/or necessary for producing microbubbles with additional auxiliary equipment. Additional auxiliary equipment (such as a pressure tank, liquid thin film [LTF], nozzle, and/or other similar devices) may be positioned upstream or downstream from a booster pump to produce microbubbles by entraining dissolved air into the pressurized water prior to exiting an enclosed chamber. Microbubbles are becoming popular in bathing, and consequently, booster pumps are being included in bathing systems.

SUMMARY

It is desirable for fluid moving systems to have the capability to produce pressures and flow rates typical of standard centrifugal pumps and booster pumps. Currently, the fluid moving systems require the installation of both a standard centrifugal pump and booster pump to have dual capability, resulting in significant cost and complexity.

In a bathing system, some users desire that a bathing environment have the capability to produce both whirlpool jets and microbubbles. Whirlpool jets typically require low pressure and high flow, whereas microbubble production typically requires high pressure and low flow. These two distinct pressure and flow characteristics require two separate pumping systems to achieve the desired characteristics—one with a centrifugal pump and one with a booster pump. This can also result in significant cost and complexity.

This disclosure provides pump casings, pump casing assemblies, pumping systems, and pumps that combine standard centrifugal pumps and booster pumps into a single combined-purpose pump casing, pump casing assembly, pumping system, and/or pump. Different types of pumps can be used in place of or with a centrifugal pump (e.g., positive displacement pump) without departing from the scope of this disclosure. The disclosure provides combined-purpose devices and systems that can function as a standard centrifugal pump, booster pump, and/or hybrid pump. One of ordinary skill in the art will appreciate that the pump casings, pump casing assemblies, pumping systems, and pumps disclosed herein can be employed in a variety of fields. For example, they can be employed in bathing systems, fluid pumping systems, water pumping systems, waste fluid pumping systems, irrigation systems, chemical plants, fire safety systems, fluid systems used for drilling, and/or any other fluid systems, devices, and/or assemblies that can benefit from having a single combined-purpose device and/or system.

The systems, methods, apparatuses, and devices of this disclosure can include a centrifugal pump for directing fluid that can have a casing that directs fluid through the casing. The centrifugal pump can have an inlet opening to direct fluid into the casing and an outlet opening to direct fluid out of the casing. The centrifugal pump can have an impeller positioned in the casing. The impeller can direct fluid from the inlet opening to the outlet opening by directing fluid from the center of the impeller to the periphery of the impeller. The centrifugal pump can have a motor configured to rotate the impeller to direct fluid from the inlet opening to the outlet opening. The centrifugal pump can have a venturi device that has a venturi inlet and a venturi outlet. The venturing device can recirculate at least a portion of fluid in the casing from the periphery of the impeller via the venturi inlet back toward the center of the impeller via the venturi outlet. The venturi outlet can be in fluid communication with the inlet opening. The venturi device can increase fluid flow rate from the venturi inlet directed to the venturi outlet to decrease pressure of the at least a portion of the fluid directed to the venturi outlet to draw fluid through the inlet opening. The centrifugal pump can have a plug that can selectively move from an open position to a closed position. In the open position, the at least a portion of fluid can be recirculated in the casing through the venturi device. In the closed position, the plug can inhibit recirculation flow through the venturi device to inhibit recirculation of the at least a portion of the fluid in the casing. When the plug is in the open position, the centrifugal pump can provide a lower fluid flow rate at a higher fluid pressure relative to when the plug is in the closed position. In the closed position, the centrifugal pump can provide a higher fluid flow rate at a lower fluid pressure relative to with the plug in the open position.

In some embodiments, the plug can be selectively moved to one or more positions between the open position and the closed position to vary fluid flow rate through the venturi device. This can provide a range of fluid flow rates and fluid pressures, ranging from the lower fluid flow rate and the higher fluid pressure in the open position to the higher fluid flow rate and the lower fluid pressure in the closed position.

In some embodiments, when the plug is in the open position, the centrifugal pump can provide a fluid flow rate of about 3 GPM at a fluid pressure of about 35 to 50 PSI, including about 35 to 45 PSI. When the plug is in the closed position, the centrifugal pump can provide a fluid flow rate of about 40 GPM at a fluid pressure of about 10 PSI.

In some embodiments, the plug has an actuator that can move the plug from the open position to the closed position.

In some embodiments, the actuator is connected to the casing.

In some embodiments, the centrifugal pump can have a cover connected to the casing. The cover can have the inlet opening and the actuator can be connected to the cover.

In some embodiments, the actuator can be moved automatically via a solenoid.

In some embodiments, the plug can be moved manually or automatically.

In some embodiments, the plug has a silicone stopper that can at least partially conform to the venturi inlet to block the venturi inlet.

The systems, methods, apparatuses, and devices of this disclosure can include a pump casing assembly configured to direct fluid. The pump casing assembly can have an inlet opening that directs a fluid through the pump casing assembly, an outlet opening that directs fluid out of the pump casing assembly, and an impeller positioned in the pump casing assembly. The impeller can direct the fluid from the inlet opening to the outlet opening. The pump casing assembly can have an ejector assembly. The ejector assembly can have a tube inlet and a tube outlet. An intermediary inner diameter of the ejector assembly, disposed between the tube inlet and tube outlet, can be smaller than an inner diameter of the tube inlet and tube outlet. The ejector assembly can recirculate at least a portion of the fluid in the pump casing assembly. The tube outlet can be in fluid communication with the tube inlet. The ejector assembly can be configured to increase fluid flow rate from the tube inlet directed to the tube outlet to decrease pressure of the at least a portion of the fluid directed to the tube outlet. This can draw fluid into the inlet opening. The pump casing assembly can have a stopper that can selectively move from an open position to a closed position. The open position can allow fluid to be recirculated in the pump casing assembly through the ejector assembly. The closed position can inhibit recirculation flow through the ejector assembly to inhibit recirculation of the at least a portion of the fluid in the pump casing assembly. When the stopper is in the open position, the pump casing assembly can provide a lower fluid flow rate at a higher fluid pressure relative to the stopper in the closed position. In the closed position, the pump casing assembly can provide a higher fluid flow rate at a lower fluid pressure.

In some embodiments, the impeller is configured to direct the fluid from the inlet opening to the outlet opening by generally directing fluid from a center of the impeller to a periphery of the impeller.

In some embodiments, the pump casing assembly has a motor that can rotate the impeller to direct the fluid from the inlet opening to the outlet opening.

In some embodiments, a centrifugal pump can include the pump casing assembly.

In some embodiments, the ejector assembly can be a uniform structure.

In some embodiments, the ejector assembly can have several components.

In some embodiments, the ejector assembly can include an elongate tube.

In some embodiments, the ejector assembly can be a venturi.

In some embodiments, the passage of fluid through the ejector assembly can have a venturi effect.

In some embodiments, an inner diameter of the ejector assembly gradually decreases in size from the inner diameter of the tube inlet to the intermediary inner diameter. The inner diameter of the ejector assembly can also gradually increase in size from the intermediary inner diameter to the inner diameter of the tube outlet.

In some embodiments, the ejector assembly can recirculate at least a portion of the fluid in the pump casing assembly from a periphery of the impeller via the tube inlet back toward a center of the impeller via the tube outlet.

In some embodiments, the stopper is within the pump casing assembly.

In some embodiments, the stopper can be partially disposed within the pump casing assembly.

In some embodiments, the stopper is coupled to the ejector assembly.

In some embodiments, the stopper can be selectively moved to one or more positions between the open position and the closed position to vary fluid flow rate through the ejector assembly and provide a range of fluid flow rates and fluid pressures. The ranges can vary from the lower fluid flow rate and the higher fluid pressure in the open position to the higher fluid flow rate and the lower fluid pressure in the closed position.

In some embodiments, with the stopper in the open position, the pump casing assembly can provide a fluid flow rate of about 3 GPM at a fluid pressure of about 35 to 45 PSI.

In some embodiments, with the stopper in the closed position, the pump casing assembly can provide a fluid flow rate of about 40 GPM at a fluid pressure of about 10 PSI.

In some embodiments, the stopper can have an actuator configured to move the stopper between the open position, closed position, and intermediary positions.

In some embodiments, the actuator can allow a user to move the plug manually.

In some embodiments, the actuator can move the plug automatically.

In some embodiments, the actuator includes a solenoid.

In some embodiments, the pump casing assembly has a cover connected to the pump casing assembly. The cover can include the inlet opening. The actuator can be connected to the cover.

In some embodiments, the stopper can have a silicone stopper that at least partially conforms to the tube inlet to block the tube inlet.

A method of making a centrifugal pump for directing fluid can include providing a casing that can direct a fluid through the casing, providing an inlet opening that can direct fluid into the casing, and providing an outlet opening that can direct fluid out of the casing. The method can include positioning an impeller in the casing. The impeller can direct the fluid from the inlet opening to the outlet opening by generally directing fluid from a center of the impeller to a periphery of the impeller. The method can include providing a motor that can rotate the impeller to cause the impeller to direct the fluid from the inlet opening to the outlet opening. The method can include providing a venturi device that can have a venturi inlet and a venturi outlet. The venturi device can recirculate at least a portion of the fluid in the casing from the periphery of the impeller via the venturi inlet back toward the center of the impeller via the venturi outlet. The venturi outlet can be in fluid communication with the inlet opening. The venturi device can increase fluid flow rate from the venturi inlet directed to the venturi outlet to decrease pressure of the at least a portion of the fluid directed to the venturi outlet to draw fluid into the inlet opening. The method can include providing a plug that can be selectively moved from an open position to a closed position. In the open position, the fluid can be recirculated in the casing through the venturi device. In the closed position, the plug can inhibit recirculation flow through the venturi device to inhibit recirculation of the at least a portion of the fluid in the casing. In the open position, the centrifugal pump can provide a lower fluid flow rate at a higher fluid pressure relative to with the plug in the closed position. In the closed position, the centrifugal pump can provide a higher fluid flow rate at a lower fluid pressure.

The systems, methods, apparatuses, and devices of this disclosure can include a pump casing assembly that can direct fluid. The pump casing assembly can have an inlet opening that can direct a fluid into the pump casing assembly and an outlet opening that can direct fluid out of the pump casing assembly. The pump casing assembly can have an ejector assembly. The ejector assembly can have an ejector inlet and an ejector outlet. The ejector assembly can have an intermediary inner diameter, disposed between the ejector inlet and ejector outlet, that is smaller than an inner diameter of the ejector inlet and outlet. The ejector assembly can recirculate at least a portion of the fluid in the pump casing assembly. The ejector outlet can be in fluid communication with the ejector inlet. The ejector assembly can increase fluid flow rate from the ejector inlet to the ejector outlet to decrease pressure of the at least a portion of the fluid at the ejector outlet to draw fluid into the inlet opening. The pump casing assembly can have a stopper that can selectively move from an open position to a closed position. In the open position, fluid can be recirculated in the pump casing assembly through the ejector assembly. In the closed position, fluid can be inhibited from recirculating through the ejector assembly to inhibit recirculation of the at least a portion of fluid in the pump casing assembly. When the stopper is in the open position, the pump casing assembly can provide a lower fluid flow rate at a higher fluid pressure relative to the plug in the closed position. In the closed position, the pump casing assembly can provide a higher fluid flow rate at a lower fluid pressure.

The systems, methods, apparatuses, and devices of this disclosure can include a pump casing assembly that can direct fluid. The pump casing assembly can include an inlet opening that can direct a fluid through the pump casing assembly. The pump casing assembly can include an outlet opening that can direct the fluid out of the pump casing assembly. The pump casing assembly can include a tube that has a tube inlet and a tube outlet. An inner diameter of the tube can be smaller than an inner diameter of the tube inlet. The tube can recirculate at least a portion of the fluid in the pump casing assembly. The tube outlet can be in fluid communication with the tube inlet. The tube can increase fluid flow rate from the tube inlet directed to the tube outlet to decrease pressure of the at least a portion of the fluid directed to the tube outlet to draw fluid into the inlet opening. The pump casing assembly can include a stopper that can selectively move from an open position, allowing fluid to be recirculated in the pump casing assembly through the tube, and a closed position, inhibiting recirculation flow through the tube to inhibit recirculation of the at least portion of the fluid in the pump casing assembly. With the stopper in the open position, the pump casing assembly can provide a lower fluid flow rate at a higher fluid pressure relative to the stopper in the closed position. The pump casing assembly can provide a higher fluid flow rate at a lower fluid pressure with the stopper in the closed position.

In some embodiments, a smallest inner diameter of the tube is proximate the tube outlet or a smallest inner diameter of the tube is at the tube inlet.

In some embodiments, the pump casing assembly forms the tube within the pump casing assembly.

In some embodiments, the pump casing assembly has an impeller positioned in the pump casing assembly that can direct the fluid from the inlet opening to the outlet opening. In some embodiments, the impeller can direct the fluid from the inlet opening to the outlet opening by directing fluid from a center of the impeller to a periphery of the impeller.

In some embodiments, the pump casing assembly has a motor that can rotate the impeller to direct the fluid from the inlet opening to the outlet opening.

In some embodiments, the tube can recirculate the at least portion of the fluid in the pump casing assembly from a periphery of the impeller via the tube inlet back toward a center of the impeller via the tube outlet.

In some embodiments, the centrifugal pump includes the pump casing assembly.

In some embodiments, the tube is a uniform structure.

In some embodiments, the tube includes several components.

In some embodiments, the tube is an ejector assembly.

In some embodiments, the tube includes a venturi.

In some embodiments, the passage of fluid through the tube has a venturi effect.

In some embodiments, the inner diameter of the tube gradually decreases in size from the inlet toward the opening.

In some embodiments, an inner diameter of the pump casing assembly increases in size from the tube outlet into the pump casing assembly.

In some embodiments, the stopper is within the pump casing assembly.

In some embodiments, the stopper is partially disposed within the pump casing assembly.

In some embodiments, the stopper is coupled to the tube.

In some embodiments, the stopper is can be selectively moved to one or more positions between the open position and the closed position to vary fluid flow rate through the tube and provide a range of fluid flow rates and fluid pressures for fluid exiting the outlet opening, ranging from the lower fluid flow rate and the higher fluid pressure in the open position to the higher fluid flow rate and the lower fluid pressure in the closed position.

In some embodiments, with the stopper in the open position, the pump casing assembly can provide a fluid flow rate of about 3 GPM at a fluid pressure of about 35 to 45 PSI.

In some embodiments, with the stopper in the closed position, the pump casing assembly can provide a fluid flow rate of about 40 GPM at a fluid pressure of about 10 PSI.

In some embodiments, the stopper includes an actuator that can move the stopper between the open, closed, and intermediary positions.

In some embodiments, the actuator can allow a user to move the plug manually.

In some embodiments, the actuator can move the plug automatically.

In some embodiments, the actuator can include a solenoid.

In some embodiments, the pump casing assembly has a cover connected to the pump casing assembly that includes the inlet opening. In some embodiments, the actuator is connected to the cover.

In some embodiments, the stopper includes a silicone stopper that can at least partially conform to the tube inlet to block the tube inlet.

The systems, methods, apparatuses, and devices of this disclosure can include a pump casing assembly that can direct fluid. The pump casing assembly can include an inlet opening that can direct a fluid into the pump casing assembly. The pump casing assembly can include an outlet opening that can direct the fluid out of the pump casing assembly. The pump casing assembly can include an ejector assembly. The ejector assembly can include an ejector inlet and an ejector outlet. An inner diameter of the ejector assembly can be smaller than an inner diameter of the ejector inlet. The ejector assembly can recirculate at least a portion of the fluid in the pump casing assembly. The ejector outlet can be in fluid communication with the ejector inlet. The ejector assembly can increase fluid flow rate from the ejector inlet directed to the ejector outlet to decrease pressure of the at least a portion of the fluid directed to the ejector outlet to draw fluid into the inlet opening. The pump casing assembly can include a stopper that can selectively move from an open position, allowing the at least portion of fluid to be recirculated in the pump casing assembly through the ejector assembly, and a closed position, inhibiting recirculation flow through the ejector assembly to inhibit recirculation of the at least portion of the fluid in the pump casing assembly. With the stopper in the open position, the pump casing assembly can provide a lower fluid flow rate at a higher fluid pressure relative to the stopper in the closed position. With the stopper in the closed position, the pump casing assembly can provide a higher fluid flow rate at a lower fluid pressure.

The systems, methods, apparatuses, and devices of this disclosure can include an ejector assembly that can direct fluid. The ejector assembly can include a tube or first pipe including a tube inlet and a tube outlet. The ejector assembly can include a fluid passageway or second pipe fluidly connecting the tube outlet to the tube inlet to recirculate fluid. The inner diameter of the tube can be smaller than an inner diameter of the fluid passageway. The ejector assembly can include a flow controller that can selectively move from an open position, allowing fluid flow into the tube inlet to recirculate through the ejector assembly, and a closed position, inhibiting recirculation fluid flow in the tube inlet and through the tube to inhibit recirculation of the fluid. The tube can increase fluid flow rate from the tube inlet to the tube outlet to decrease pressure of the fluid directed through the tube.

In some embodiments, a smallest inner diameter of the ejector assembly is at the tube outlet.

In some embodiments, the ejector assembly includes a venturi.

In some embodiments, passage of fluid through the ejector assembly has a venturi effect.

In some embodiments, the flow controller can be selectively moved to one or more positions between the open position and the closed position to vary fluid flow rate through the ejector assembly and provide a range of fluid flow rates and fluid pressures for fluid exiting the tube outlet, ranging from the lower fluid flow rate and the higher fluid pressure in the open position to the higher fluid flow rate and the lower fluid pressure in the closed position.

In some embodiments, the ejector assembly includes an actuator that can move the flow controller between the open, closed, and intermediary positions.

In some embodiments, the flow controller can allow a user to move the flow controller manually.

In some embodiments, the flow controller can be moved automatically.

In some embodiments, the flow controller includes a solenoid.

In some embodiments, the flow controller includes a valve.

In some embodiments, the flow controller includes a silicone stopper that can at least partially conform to the tube inlet to block the tube inlet.

In some embodiments, the tube and the fluid passageway are positioned outside a pump casing.

BRIEF DESCRIPTION OF THE DRAWINGS

Various embodiments are depicted in the accompanying drawings for illustrative purposes and may not be drawn to scale, and should in no way be interpreted as limiting the scope of the embodiments. In addition, various features of different disclosed embodiments can be combined to form additional embodiments, which are part of this disclosure. In the drawings, similar elements may have reference numerals with the same last two digits.

FIG. 1 is a schematic illustrating an example of a combined-purpose device.

FIG. 2 is a schematic illustrating an example of a combined-purpose device.

FIG. 3 illustrates an example portion of an ejector assembly.

FIG. 4 illustrates an example of a manual plug.

FIG. 5 illustrates an example of a blocking portion of a stopper.

FIG. 6 illustrates an example of a solenoid operated plug.

FIG. 7 illustrates an example of a solenoid operated plug.

FIG. 8 illustrates an example of a cross-section view of a combined-purpose device with a plug in an open position.

FIG. 8A illustrates an enlarged view of a portion of FIG. 8.

FIG. 9 illustrates an example of a cross-section view of combined-purpose device with a plug in a closed position.

FIG. 9A illustrates an enlarged view of a portion of FIG. 9.

FIG. 10 illustrates an example cross-section view of a portion of a combined purpose device.

FIG. 11 illustrates an example of a combined-purpose system.

DETAILED DESCRIPTION

Although certain embodiments and examples are described below, this disclosure extends beyond the specifically disclosed embodiments and/or uses and obvious modifications and equivalents thereof. Thus, it is intended that the scope of this disclosure should not be limited by any particular embodiments described below. Furthermore, this disclosure describes many embodiments in reference to bathing environments but any embodiment and modifications or equivalents thereof should not be limited to bathing environments.

Example Combined-Purpose Device

FIG. 1 schematically illustrates an example of a combined-purpose device 100, including for example, a pump for pressurizing and directing fluid such as liquid, including water. The combined-purpose device 100 should not be limited to what is described herein. Combined-purpose device 100 can have fewer or more components than those described herein. Components of combined-purpose device 100 can have characteristic and/or configuration variations of similar components of combined-purpose devices and/or systems described herein.

The combined-purpose device 100 can include a pump casing 136. The pump casing 136 can have an inlet 102 through which a fluid can enter the internal cavity of pump casing 136. The pump casing 136 can have an outlet 104 through which a fluid can exit the internal cavity of pump casing 136. The inlet 102 can be fluidically coupled or connected to an ejector primary opening 132 of an ejector assembly 112. Ejector assembly and ejector are frequently referred to throughout the entirety of this disclosure. Ejector assembly and ejector can be similar or equivalent to venturi, venturi device/assembly, eductor, eductor device/assembly, aspirator, aspirator device/assembly, injector, and/or injector device/assembly. In some embodiments, the terms can be used interchangeably to refer to substantially the same or similar component(s) achieving substantially the same or similar function. All can function using principles of a venturi.

An O-ring 110 can be disposed between the inlet 102 and ejector primary opening 132, also referred to as a suction chamber opening and/or suction chamber. The ejector primary opening 132 can be fluidically connected to an inner tube of ejector assembly 112. The ejector assembly 112 can have an ejector inlet 134, also referred to as an actuating nozzle, and ejector outlet 148, also referred to as diffuser, which are fluidically connected by the inner tube of ejector assembly 112. Various names can be used to reference the ports, openings, inlets, and/or outlets of the ejector assembly 112 and/or their functions without departing from the scope of this disclosure. The ejector assembly 112 can cause a high flow pressure drop when fluid passes through the ejector inlet 134, inner tube of ejector assembly 112, and ejector outlet 148.

The ejector outlet 148 can be coupled to an aperture 142 of impeller cover plate 114. The impeller cover plate 114 can enclose or partially enclose impeller 116. The rotation of impeller 116 can direct fluid toward the impeller center 144 of impeller 116 and then toward the periphery 146 of impeller 116. Impeller 116 can be coupled to the shaft 140 of motor 128 such that the motor 128 can rotate the shaft 140, causing the rotation of impeller 116. A seal spring 120 can be disposed between motor 128 and impeller 116 along the same axis of shaft 140. A rear pump casing 122 can be disposed between motor 128 and impeller 116 along the same axis of shaft 140. The motor 128 can have a fan cover 130. The motor 128 can have a terminal box 126 that contains electrical components.

Rear pump casing 122 can be coupled or connected to the coupling portion 138 of pump casing 136. An O-ring 118 can be disposed between the rear pump casing 122 and the coupling portion 138 of pump casing 136. The coupling portion 138 of pump casing 136 can be coupled to volute cover 124 of motor 128. In some embodiments, the coupling of the rear pump casing 122 to the coupling portion 138 of pump casing 136 creates a fluidically enclosed chamber that only, or primarily, allows fluid to enter through inlet 102 and exit through outlet 104.

The pump casing 136 can include an ejector access port 106. A plug 108, also referred to as a stopper or obstruction mechanism, can be coupled, inserted within, and/or connected to ejector access port 106. In some embodiments, a valve or other flow controller can replace or work with the plug 108. In some embodiments, the plug 108, and the other plugs referenced herein, can be a throttling device, valve, flow restrictor, diverter, and/or other mechanisms of controlling, limiting, and/or changing the flow of fluid. The ejector access port 106 can be configured to prevent fluid from exiting ejector access port 106 with a sealing component. The plug 108 can prevent fluid from exiting ejector access port 106. The plug 108 can have a length that extends from ejector access port 106 to ejector inlet 134 (e.g., recirculation inlet). The plug 108 can be manipulated such that a portion of plug 108 obstructs the ejector inlet 134 such that fluid cannot enter ejector inlet 134 (e.g., prevents recirculation of fluid therethrough). This can be referred to as a closed position. The plug 108 can be manipulated such that a portion of plug 108 does not obstruct the ejector inlet 134 such that fluid can enter ejector inlet 134. This can be referred to as an open position. The plug 108 can be manipulated such that a portion of plug 108 partially obstructs the ejector inlet 134 such that fluid can enter ejector inlet 134 but at a rate between the open and closed positions. This can be referred to as an intermediary position. In some embodiments, modulation between a continuum of intermediary positions can allow a pump to operate on an expanded continuum of a pressure/flow curve. This can allow adaptation of a pump to different pressure and flow requirements of a plumbing and/or piping system. For example, with the plug 108 relatively closer to the closed position, the flow rate of recirculated fluid through the ejector assembly 112 can be reduced. Conversely, with the plug 108 relatively closer to the open position, the recirculation flow rate through the ejector assembly 112 can be increased.

In operation, the motor 128 can rotate shaft 140, causing the impeller 116 to rotate. The rotation of impeller 116 can pull fluid through inlet 102. The fluid can flow through the inlet 102 to the ejector primary opening 132, through an inner tube of the ejector assembly 112, and out the ejector outlet 148. The fluid can continue through the aperture 142 of cover plate 114 and toward the impeller 116. The rotating impeller 116 can pull fluid toward the impeller center 144 and then direct the fluid toward a periphery 146 of impeller 116.

When the plug 108 is in the open position, not obstructing the ejector inlet 134, the fluid can flow in at least two directions from the periphery 146 of impeller 116. A portion of fluid can exit outlet 104, which may be connected to a bathing environment or piping that leads to a bathing environment. A portion of fluid can be recirculated within the pumping casing 136 to flow into ejector inlet 134, through the inner tube of ejector assembly 112, and out the ejector outlet 148, causing a high flow pressure drop. Due to this high flow pressure drop, fluid can be drawn in from inlet 102. This can contribute to a significant pressure boost. In some embodiments, the pressure boost can be in the range of raising pressure to 45-50 PSI. In some embodiments, the pressure boost can be in the range of about 3-100 PSI, including about 5-60 PSI. Given the significant pressure boost and reduced flow from the recirculated fluid, the portion of fluid exiting outlet 104 can exit at a high pressure and low flow rate. In some embodiments, the fluid exiting outlet 104 can exit at 45-50 PSI and approximately 3 GPM or less. In some embodiments, the fluid exiting outlet 104 can exit at 35-45 PSI. In some embodiments, the fluid exiting outlet 104 can exit at about 3-100 PSI, including about 5-60 PSI and about 1-150 GPM, including about 3-100 GPM. This can produce pressure and flow rates desirable and/or necessary for producing microbubbles, with additional auxiliary equipment, that can be fed into a bathing or other environment.

When the plug 108 is in the closed position, obstructing the ejector inlet 134, the fluid may not be recirculated through the inner tube of ejector assembly 112. The fluid flows from the periphery 146 of impeller 116 to exit outlet 104. Given that the fluid is not recirculated through the ejector assembly 112, there is no significant pressure boost or lost flow. Instead, plug 108 in the closed position can result in fluid exiting outlet 104 at a relatively low pressure and high flow rate. In some embodiments, this can include fluid exiting outlet 104 at 10 PSI and 40 GPM or more. In some embodiments, the fluid exiting outlet 104 can exit at 35-45 PSI. In some embodiments, the fluid exiting outlet 104 can exit at about 3-100 PSI, including about 5-60 PSI, and at about 1-150 GPM, including about 3-100 GPM. This can include standard pressure and flow rates that are used for whirl pool jets in bathing environments. In some embodiments, auxiliary equipment, such as a venturi jet, can be used to draw air into the fluid, causing the fluid to have bubbles. These bubbles do not constitute “microbubbles.”

When the plug 108 is in an intermediary position, partially obstructing the ejector inlet 134, the fluid can recirculate through the inner tube of ejector assembly 112 but at reduced levels compared to the open position because less fluid can pass through the ejector assembly 112. This can result in a reduced pressure boost and flow loss. Consequently, the fluid exiting outlet 104 can have pressure and flow rates between what can occur when the plug 108 is in the open or closed positions. In some embodiments, the fluid exiting outlet 104 can exit at 10-45 PSI and 3-40 GPM. In some embodiments, the fluid exiting outlet 104 can exit at about 3-100 PSI, including about 5-60 PSI, and at about 1-150 GPM, including about 3-100 GPM.

The features described in reference to FIG. 1 can be altered to include equivalents and obvious modifications. For example, the components of the combined-purpose device 100 can be made of any material suitable for containing and/or interacting with fluid and that can withstand the pressures and flow rates described herein. In some embodiments, the components of the combined-purpose device 100 can be made of metals, metal alloys, polymers (including rubbers, silicone, etc.), ceramics, and/or other suitable materials.

In some embodiments, the pump casing 136 can be one unitary structure. In some embodiments, the pump casing 136 can comprise multiple components that couple together to provide an enclosure capable of containing fluid.

In some embodiments, the inlet 102 can be located anywhere on the pump casing 136 or located on another component that is coupled to the pump casing 136. The inlet 102 can be any shape that includes a cavity through which fluid can flow. This can include tubes with outer or inner perimeters that are circular, square, polygonal, etc. The inlet 102 can be varying sizes. The varying sizes and shapes of inlet 102 can alter the pressure and flow rate of fluid, including when fluid ultimately exits outlet 104. The inlet 102 can have internal and/or external threads for coupling inlet 102 to piping and/or another member. The inlet 102 can have a shape and size configured to be press-fit to piping and/or another member. The same characteristics for inlet 102, as outlined above, can be altered for outlet 104.

In some embodiments, the ejector assembly 112 is one unitary structure. In some embodiments, the ejector assembly 112 comprises multiple components that are coupled together. In some embodiments, the ejector assembly 112 includes an elongate tube. In some embodiments, the ejector assembly 112 includes a venturi device. This can include using the venturi effect to some degree to alter the pressure and flow rate of fluid as fluid passes through ejector assembly 112. In some embodiments, the ejector assembly 112 can be located in varying positions within the pump casing 136. In some embodiments, the ejector assembly 112 can be oriented vertically, horizontally, or in other configurations. In some embodiments, the ejector assembly 112 can be located external to the pump casing 136. Stated differently, a centrifugal pump or positive displacement pump can perform as a booster pump with the addition of an external ejector assembly 112 (e.g., venturi). For example, a water well pump can be converted from a shallow well to deep well function by including an ejector, which can include having an ejector by a foot valve in a deep well application. In some embodiments, only a single ejector assembly 112 is employed. In some embodiments, more than one ejector assemblies 112 are employed. In some embodiments, one or more ejector assemblies 112 are employed in parallel. In some embodiments, one or more ejector assemblies 112 are employed in a staged configuration. In some embodiments, one or more ejector assemblies are employed in series.

In some embodiments, the ejector primary opening 132, ejector inlet 134, ejector outlet 148, and inner tube of the ejector assembly 112 can be varying shapes and sizes. The varying shapes and sizes can alter the pressure and flow rate of the fluid, which can include when fluid ultimately exits outlet 104. In some embodiments, the ejector inlet 134 and the ejector outlet 148 have the same inner diameter or size. In some embodiments, the ejector inlet 134 has an inner diameter or size that is smaller than the inner diameter or size of ejector outlet 148. In some embodiments, an intermediary diameter or size of the inner tube of ejector assembly 112, disposed between ejector inlet 134 and ejector outlet 148, can be smaller than the inner diameter or size of both ejector inlet 134 and ejector outlet 148. In some embodiments, the intermediary diameter or size of the inner tube of ejector assembly 112 can have the same inner diameter or size as ejector inlet 134 but a smaller inner diameter or size than ejector outlet 148. In some embodiments, the intermediary diameter or size of the inner tube of ejector assembly 112 can have the same inner diameter or size ejector outlet 148. In some embodiments, the ejector assembly 112 causes a high flow pressure drop when fluid passes through it, which draws fluid in inlet 102 and through ejector primary opening 132. This can result in a pressure boost. In some embodiments, the pressure boost is 45-50 PSI but the components and features of combined-purpose device 100, including ejector assembly 112, can be altered to produce different pressure boosts, including pressure boosts above 50 PSI or 5-60 PSI. In some embodiments, the fluid exiting outlet 104 can exit at 35-45 PSI.

In some embodiments, the ejector outlet 148 can be coupled to an aperture 142 of impeller cover plate 114. In some embodiments, the impeller cover plate 114 includes apertures around the periphery 146 of impeller 116 such that fluid can be directed in certain directions, which can include toward outlet 104 and/or to be recirculated through ejector inlet 134. The number of apertures around the periphery of impeller 116 can vary. In some embodiments, the entire periphery 146 of impeller 116 is not covered by impeller cover plate 114. In some embodiments, the combined-purpose device 100 does not include an impeller cover plate 114.

In some embodiments, the impeller 116, when in operation, directs fluid toward a center 144 of impeller 116. The impeller 116, when in operation, can direct fluid from impeller center 144 toward a periphery 146 of impeller 116. Impeller 116 can have any number of vanes. In some embodiments, impeller 116 is a closed impeller, meaning that vanes are disposed between two plates. This can be preferred when interacting with a fluid that is substantially free of particles. A closed impeller can direct a fluid to travel the channels between the vanes and inner plate surfaces. In some embodiments, impeller 116 is a semi-open impeller, meaning that any vanes are disposed on a single plate. A semi-open impeller can direct fluid, less efficiently than a closed impeller, but can operate with more viscous fluids and/or fluids with particles. In some embodiments, impeller 116 is an open impeller, meaning that any vanes are not supported by plates. An open impeller can direct fluid, less efficiently than a closed or semi-open impeller, but can operate with high viscosities and/or concentrations of particles.

In some embodiments, motor 128 rotates shaft 140 causing the rotation of impeller 116 which pulls liquid through inlet 102 and toward impeller 116. The motor 128 can be a dc motor, ac motor, motor that relies on combustion, or any other motor that can rotate the shaft 140 to cause the rotation of impeller 116. In some embodiments, the motor 128 can rotate the shaft 140 at different speeds to cause the fluid to have different flow rates and pressures.

In some embodiments, the pump casing 136 or another component coupled to the pump casing 136 can include an ejector access port 106. In some embodiments, the ejector access port 106 can allow access to the ejector inlet 134 without allowing a significant amount of fluid to escape through the ejector access port 106. In some embodiments, the ejector access port 106 will prevent a significant amount of fluid from escaping through the ejector access port 106 when plug 108 is coupled and/or inserted in the ejector access port 106. In some embodiments, ejector access port 106 is configured to allow at least a portion of plug 108 to be inserted through it such that at least a portion of plug 108 can obstruct the ejector inlet 134. In some embodiments, ejector access port 106 comprises a hole that pierces pump casing 136 or another component coupled to the pump casing 136. The ejector access port 106 can be any shape that includes a cavity through which plug 108, a portion of plug 108, and/or other components of plug 108, which can include components that facilitate actuation of plug 108, may be inserted. In some embodiments, the ejector access port 106 comprises a hole with threads that can mate with other threaded components, such as plug 108 or a portion of plug 108. In some embodiments, the ejector access port 106 is positioned along the same axis as the axis of the inner tube of ejector assembly 112, ejector inlet 132, and/or ejector assembly 112. In some embodiments, the ejector access port 106 can be located anywhere on pump casing 136 or a component coupled to pump casing 136.

In some embodiments, a plug 108, also referred to as a stopper or obstruction mechanism, can be inserted in, coupled to, and/or otherwise interface with the ejector access port 106. In some embodiments, the plug 108 can be manually actuated between the closed position, open position, and any intermediary position through the ejector access port 106. In some embodiments, the plug 108 has a length that, when in the closed position, extends from outside the pump casing 136 or a component coupled to the pump casing 136 to the ejector inlet 134 or a position past the ejector inlet 134 but within the inner tube of ejector assembly 112. In some embodiments, a user can push or pull on a portion of plug 108 that is exposed outside the pump casing 136. A user can push on the exposed portion of plug 108 to put plug 108 in a closed position, such that the opposing portion of plug 108, sometimes referred to as a blocking portion, obstructs the ejector inlet 134.

In some embodiments, the blocking portion of plug 108 comprises a flat surface that can cover the entirety of the ejector inlet 134. In some embodiments, the blocking portion of plug 108 comprises a shape such that the blocking portion of plug 108 can partially enter ejector inlet 134 while making contact with the inside perimeter of ejector inlet 134, obstructing fluid from entering ejector inlet 134. In some embodiments, the blocking portion of plug 108 comprises a shape such that the blocking portion of plug 108 enters the ejector inlet 134 and forms a fluid obstructing interface with a portion of the inner tube of ejector assembly 112. In some embodiments, a user may pull on the exposed portion of plug 108 to move plug 108 into an open position such that the blocking portion of plug 108 is not obstructing fluid from entering inlet 134. In some embodiments, a user may push or pull on the exposed portion of plug 108 to move plug 108 into a variety of intermediary positions such that the blocking portion of plug 108 is partially obstructing the ejector inlet 134. In some embodiments, plug 108 has markings that indicate when the plug is in the closed position, open position, and/or an intermediary position. In some embodiments, the pushing and pulling described above can be performed automatically. This automatic actuation can be performed with a solenoid, pneumatic actuator, and/or other mechanisms.

In some embodiments, the plug 108 can be manually actuated between the different positions by rotating the exposed portion of plug 108. In some embodiments, at least a portion of plug 108, or a component of plug 108, and the ejector access port 106 can be threaded such that rotation of plug 108 advances or retracts plug 108 between the different positions. In some embodiments, the rotational movement described above can be performed automatically. In some embodiments, the rotational movement described above can be performed manually.

In some embodiments, the plug 108 can be advanced or retracted using a configuration similar to a pinion gear and rack gear, converting rotary motion to linear motion. A side portion of plug 108 can have teeth that interface with a gear. The gear can be mounted on a portion of pump casing 136 or a component coupled to pump casing 136. Rotation of the gear, while interfaced with the teeth located on a side portion of plug 108, can cause plug 108 to be advanced or retraced between the different positions. This can be accomplished manually and/or automatically. In some embodiments, automatic actuation can be performed with a solenoid, pneumatic actuator, and/or other mechanisms.

In some embodiments, the plug 108 may be entirely enclosed within the pump casing 136. Plug 108 can be actuated between the different positions with an automatic actuator disposed within the pump casing 136 and electrical wiring exiting the pump casing 136 through the ejector access port 106 or another port. Alternatively, plug 108 can be actuated between the different positions with pneumatic actuation with support tube(s) exiting the pump casing 136.

In some embodiments, the plug 108 can comprise a valve that is positioned on, within, or in a position immediately preceding or subsequent to the ejector inlet 134. In some embodiments, the valve can be a ball valve, butterfly valve, gate valve, plug valve, or any other valve that can be positioned in open, closed, and/or intermediary positions. For example, in some embodiments, the plug 108 comprises a knife gate valve. The knife gate valve can comprise a handle portion outside the pump casing 136 that can be pushed or pulled. The handle portion can be connected to an elongate member that extends through the ejector access port 106, which can be positioned anywhere on the pump casing 136, to move the gate between a closed position, open position, and intermediary positions. The elongate member can extend in a direction that is perpendicular to the axis of the ejector inlet 134. In some embodiments, a user can grasp the handle portion and manually move the knife gate between the different positions by pushing or pulling. In some embodiments, an automatic actuator moves the knife gate between the different positions. A similar configuration could be used for other valves, including valves the are closed or opened using rotational motion. In embodiments that rely on closing and opening valves using rotational motion, a user can grasp a handle portion and rotate the handle causing the valve to rotate between positions. In some embodiments, an automatic actuator can rotate the valve between different positions.

As disclosed herein, the plug can be moved between a closed position, open position, and/or intermediary positions. In some embodiments, the open position correlates with fluid exiting outlet 104 at 45-50 PSI and approximately 3 GPM or less. In some embodiments, the closed position correlates with fluid exiting outlet 104 at 10 PSI and 40 GPM or more. In some embodiments, an intermediary position correlates with fluid exiting outlet 104 at 10-45 PSI and approximately 3-40 GPM. There can be any number of intermediary positions that correlate to varying pressures and flow rates. In some embodiments, there are discrete intermediary positions. In some embodiments, the fluid exiting outlet 104 can exit at 5-60 PSI and 3-100 GPM. In some embodiments, there is a continuum of intermediary positions. In some embodiments, the pressure and flow rate of fluid exiting outlet 104, when in any of the positions, can be altered depending on the configuration (including the shape, sizing, positioning, and/or orientation) of the ejector assembly 112, ejector inlet 134, ejector outlet 148, inner tube of the ejector assembly 112, pump casing 136, inlet 102, outlet 104, plug 108, ejector primary opening 132, rotational speed of the shaft 140, impeller 116, and/or impeller cover plate 114.

Another Example Combined-Purpose Device

FIG. 2 schematically illustrates an example of a combined-purpose device 200. Components of combined-purpose device 200 can have, but are not limited to, the same characteristic and/or configuration variations of similar components of combined-purpose device 100 or other devices and/or systems described herein. The combined-purpose device 200 should not be limited to what is described herein. Combined-purpose device 200 can have fewer or more components than those described herein.

The combined-purpose device 200 can include a pump casing cover 204. The pump casing cover 204 can have an ejector access port 206. A plug 208 can operatively interface with the ejector access port 206 on pump casing cover 204. The pump casing cover 204 can have an inlet 238 that can couple to inlet pipe fittings 202. Inlet 238 can be fluidically connected to ejector primary opening 244, also referred to as suction chamber opening or suction chamber, of ejector assembly 212. Ejector assembly 212 can have an ejector inlet 232, also referred to as an actuating nozzle, and ejector outlet 234, also referred to as a diffuser. A inner tube of ejector assembly 212 can fluidically connect ejector inlet 232 and ejector outlet 234. In some embodiments, an inner diameter of the inner tube of ejector assembly 212 is smaller than a diameter of ejector inlet 232 and ejector outlet 234. In some embodiments, an inner diameter of the inner tube of ejector assembly 212 is smaller than a diameter of ejector inlet 232 at ejector outlet 234. In some embodiments, the ejector assembly 212 can cause a high flow pressure drop when fluid passes through the ejector inlet 232, inner tube of ejector assembly 212, and ejector outlet 234.

The ejector outlet 234 can be coupled to an impeller center 240 of impeller 218. Impeller 218 can be coupled to the shaft 222 of motor 224. A spring seal 220 can be disposed between the impeller 218 and the motor 224. The motor 224 can include a cooling fan 228, cooling fan cover 226, and/or electrical termination box 230. The motor 224 can have a volute cover 236 that couples with the pump casing 214. The volute cover 236, pump casing 214, and pump casing cover 204 can be coupled together, with an O-ring 210 optionally disposed between the pump casing cover 204 and pump casing 214, to provide a fluidically enclosed chamber. Fluid can primarily enter through inlet 238 and exit through outlet 216.

In operation, the motor 224 rotates shaft 222 causing the impeller 218 to rotate. The rotational motion of impeller 218 causes fluid to be pulled through the inlet 238. Fluid moves through the primary ejector opening 244, inner tube of the ejector assembly 212, and out the ejector outlet 234. The fluid continues to the impeller 218. In some embodiments, the fluid is directed toward the impeller center 240 and then directed toward a periphery 242 of impeller 218. When the plug 208 is in the open position, the fluid is directed in at least two directions. A portion of fluid is directed toward outlet 216, which may be connected to a bathing environment or piping that leads to a bathing environment. A portion of fluid is directed toward ejector inlet 232 to be recirculated through the ejector assembly 212. The fluid moves through the ejector inlet 232, inner tube of ejector assembly 212, and out the ejector outlet 234. This can cause a high flow pressure drop which draws fluid in from inlet 238. This can result in a pressure boost. Given the pressure boost and flow lost from recirculation, the fluid exiting outlet 216 can be at a high pressure and low flow rate. This can produce flow rates and pressures that are desirable and/or necessary for producing microbubbles, with additional auxiliary equipment, which are fed into a bathing environment. In some embodiments, the fluid can exit outlet 216 at 45-50 PSI and 3 GPM or less. In some embodiments, the fluid exiting outlet 216 can exit at 5-60 PSI and 3-100 GPM.

In the closed position, fluid cannot enter and/or substantially enter the inlet 232. The fluid can be directed primarily in one direction. The fluid is directed toward outlet 216. A portion of the fluid is not recirculated through the ejector assembly 212, and consequently, there is no corresponding pressure boost and flow loss. Accordingly, the fluid can exit outlet 216 at a low pressure and high flow rate. This configuration can be used to operate what is commonly referred to as whirlpool jets. In some embodiments, the fluid exiting outlet 216 can be at 10 PSI and 40 GPM or more. In some embodiments, the fluid exiting outlet 216 can exit at about 3 to 100 PSI, including about 5-60 PSI and about 1-150 GPM, including about 3-100 GPM.

In an intermediary position, fluid is recirculated through the ejector assembly 212 but at a rate between that of the closed and open position. This can result in fluid exiting outlet 216 at a pressure and flow rate between the pressure and flow rate of the open and closed positions. In some embodiments, the fluid can exit outlet 216 at approximately 10-45 PSI and 3-40 GPM. In some embodiments, the fluid exiting outlet 216 can exit at about 3-100 PSI, including about 5-60 PSI and about 1-150 GPM, including about 3-100 GPM.

In some embodiments, the pressure and flow rate of fluid exiting outlet 216, when in any of the positions, can be altered depending on the configuration (including the shape, sizing, positioning, and/or orientation) of the ejector assembly 212, elector inlet 232, ejector outlet 234, inner tube of the ejector assembly 212, pump casing 214, inlet 238, outlet 216, plug 208, ejector primary opening 244, rotational speed of the shaft 222, and/or impeller 218.

Example Portion of an Ejector Assembly

FIG. 3 illustrates an example of a portion of an ejector assembly 300. Components of ejector assembly 300 can have, but are not limited to, the same characteristic and/or configuration variations of similar components of combined-purpose devices and/or systems disclosed herein. The ejector assembly 300 should not be limited to what is described herein. Ejector assembly 300 can have fewer or more components and variations of those components than those described herein.

Ejector assembly 300 can have an ejector primary opening 302. Ejector primary opening 302 can have an O-ring 308 that facilitates creating a fluidically sealed connection between another member, such as another inlet and/or piping, and ejector primary opening 302. Ejector primary opening 302 can have an inner perimeter 310 that can include threads such that the ejector primary opening 302 can be coupled to another member by a threaded connection. In some embodiments, the outside perimeter surface of ejector primary opening 302 can include threads to facilitated coupling. Ejector primary opening 302 can include an obstructing wall 314 to alter the flow and pressure of fluid as the fluid enters ejector primary opening 302. Ejector primary opening 302 can be fluidically connected to an inner tube of ejector assembly 300. An ejector inlet 304 can be fluidically connected to the inner tube of ejector assembly 300. The ejector assembly 300 can be coupled to an impeller 306. The ejector assembly 300 can have support structures 312 disposed at various positions to assist in stabilizing the ejector assembly 300. In some embodiments, support structures 312 can be configured to direct fluid flow toward the ejector inlet 304.

In operation, the impeller 306 can rotate, drawing fluid in through ejector primary opening 302. The fluid flow and pressure can be altered by obstructing wall 314. The fluid can exit ejector assembly 300 in the direction of the impeller 306. Impeller 306 can direct a portion of fluid to exit a pump casing in which the ejector assembly 300 is located. The impeller can direct a portion of fluid to be recirculated through the ejector assembly 300. The fluid can be recirculated into the inner tube of ejector assembly 300.

Fluid can enter the ejector inlet 304 and pass through the ejector assembly 300. The passage of fluid through the ejector inlet 304 and inner tube of ejector assembly 300 can cause a high flow pressure drop. The high flow pressure drop can cause fluid to be drawn in through ejector primary opening 302, resulting in a pressure boost once the fluid is directed through the impeller. The fluid can then have high pressure and low flow rate characteristics. In some embodiments, the ejector inlet 304 can be obstructed by a plug such that fluid cannot flow through the ejector inlet 304. Consequently, the fluid does not pass through the ejector assembly 300 and is not subject to a pressure boost or loss of flow from fluid being recirculated. The fluid can then have low pressure and high flow rate characteristics. In some embodiments, the ejector inlet 304 can be partially obstructed by a plug. Fluid can be recirculated through the ejector assembly 300 but at a diminished rate compared to when ejector inlet 304 is completely unobstructed. The fluid can have varying levels of pressure and flow rate depending on the degree to which ejector inlet 304 is obstructed.

The ejector primary opening 302 can be any shape that includes a cavity through which fluid can flow. This can include tubes with outer or inner perimeters that are circular, square, polygonal, etc. The ejector primary opening 302 can be varying sizes. The varying sizes and shapes of ejector primary opening 302 can alter the pressure and flow rate of fluid. The ejector primary opening 302 can have internal and/or external threads for coupling to piping and/or another member. The ejector primary opening 302 can have a shape and size configured to be press-fit to piping and/or another member. The ejector primary opening 302 can be fluidically coupled to the inner tube of ejector assembly 300.

The ejector inlet 304 can be any shape that includes a cavity through which fluid can flow. This can include tubes with outer or inner perimeters that are circular, square, polygonal, etc. The ejector inlet 304 can be varying sizes. The varying sizes and shapes of ejector inlet 304 can alter the pressure and flow rate of fluid. The outer surface of the portion of the ejector assembly 300 that surrounds ejector inlet 304 can be formed to have a gradual slope that directs recirculated fluid to enter the ejector inlet 304.

A plug can be positioned to cover varying portions of ejector inlet 304. In some embodiments, a plug can be partially inserted into ejector inlet 304 such that an outer perimeter of the plug makes contact with an inner perimeter of ejector inlet 304, obstructing fluid from being recirculated through ejector inlet 304. In some embodiments, a plug can make contact with the outer surface of the portion of the ejector assembly 300 that surrounds ejector inlet 304, obstructing fluid from being recirculated through ejector inlet 304. In some embodiments, a plug can be advanced and retracted between obstructing, partially obstructing, and not obstructing ejector inlet 304 along the same axis as ejector inlet 304. In some embodiments, a plug can be advanced and retracted between obstructing, partially obstructing, and not obstructing ejector inlet 304 from a direction perpendicular to the axis of ejector inlet 304. In some embodiments, a plug can be actuated between different positions, which can include manual actuation and automatic actuation. In some embodiments, an actuator can approach/retract from the ejector inlet 304, or slide sideways over or away from ejector inlet 304.

Example Manual Plug

FIG. 4 illustrates an example of a combined-purpose device 400. Components of combined-purpose device 400 can have, but are not limited to, the same characteristic and/or configuration variations of similar components of other combined-purpose devices and/or systems described herein. The combined-purpose device 400 should not be limited to what is described herein. Combined-purpose device 400 can have fewer or more components with other variations than those described herein.

The combined-purpose device 400 can include a pump casing 406. The pump casing 406 can include an inlet 402 through which fluid can enter the pump casing 406. The inlet 402 can have an inner perimeter 404. In some embodiments, inner perimeter 404 can be threaded. The pump casing 406 can include an outlet 408 through which fluid can exit the pump casing 406. The pump casing 406 can include an ejector access port 410. A fitting (nozzle, barbed nozzle) 416 can be positioned within and/or on the ejector access port 410. Fitting 416 can have a cavity through which the extension portion (shaft, rod) 412 of stopper 418, also referred to as a plug and/or obstruction mechanism, may be inserted.

The stopper 418 can include a grasping portion 414 that a user can grasp. The grasping portion 414 can be connected to extension portion 412 that extends through the ejector access port 410. The end of the extension portion 412, opposite the grasping portion 414, can include a blocking portion that is configured to obstruct and/or partially obstruct an ejector inlet such that recirculating fluid cannot enter an ejector assembly. In some embodiments, the grasping portion 414, extension portion 412, and blocking portion are one unitary body. In some embodiments, the grasping portion 414, extension portion 412, and blocking portion are separate components that are coupled and/or otherwise connected together.

In operation, a user can grasp the grasping portion 414 and push and/or pull the stopper 418 between closed, open, and/or intermediary positions. The extension portion 412 can slide in and out of the cavity of fitting 416 as the user pushes and pulls. The fitting 416 can completely or substantially prevent fluid from escaping the cavity of fitting 416 and/or ejector access port 410, including when the extension portion 412 slides between different positions.

The stopper 418 can be placed in a closed position that blocks an ejector inlet such that fluid is not recirculated through an ejector assembly. The user can grasp and push the grasping portion 414 to move the plug into the closed position. The extension member 412 can have a length that is configured to engage the blocking portion of stopper 418 with the ejector inlet such that fluid cannot enter the ejector inlet. This can cause fluid to exit the outlet 408 at a low pressure and high flow rate. This configuration can be used to operate what is commonly referred to as whirlpool jets in a bathing environment.

The stopper 418 can be placed in an open position such that a blocking portion does not block an ejector inlet, allowing fluid to be recirculated through an ejector assembly. The user can grasp and pull the grasping portion 414 to move the plug into the open position. The passage of recirculating fluid through an ejector assembly can cause a pressure boost and loss of flow. This can cause the fluid to exit the outlet 408 at a high pressure and low flow rate. This configuration can produce pressures and flow rates that are desirable and/or necessary for producing microbubbles, with additional auxiliary equipment, in a bathing environment.

The stopper 418 can be placed in one of several intermediary positions, allowing fluid to be recirculated through the ejector assembly but to a smaller degree than the open position. The user can grasp and pull or push the grasping portion 414 to move the plug into an intermediary position. The passage of recirculating fluid through the ejector assembly can cause a pressure boost and loss of flow, but this can result in intermediary pressures and flow rates. This can produce pressure and flow characteristics that are between what results from the closed and open positions. This can include produce pressures and flow rates that can or cannot produce microbubbles, with additional auxiliary equipment.

In some embodiments, the extension portion 412 can include markings on a side or surrounding the entire perimeter that indicate when the stopper 418 is in the closed, open, and/or an intermediary position. In some embodiments, the markings can provide the corresponding pressure and flow rate that will result in the different positions. In some embodiments, the markings indicate “microbubble mode,” “jets mode,” “hybrid mode,” and/or other descriptors to communicate to a user the resulting fluid characteristics that will result from moving the plug to different positions.

The grasping portion 414 can have any shape or size that is configured to allow a user to manually actuate the stopper 418. In some embodiments, the grasping portion is ergonomically designed to interact with the hand of a user. In some embodiments, the grasping portion is a cylindrical, spherical, polygonal, or another suitable shape.

The extension portion 412 can have varying lengths so long as the stopper 418 can be slid between different positions. The extension portion 412 can have different cross-sectional profiles. In some embodiments, the extension portion 412 can have a cross-sectional profile that is configured to interface with fitting 416 to prevent fluid from escaping fitting 416.

In some embodiments, the stopper 418 can be moved to different positions with an automatic mechanism.

Example Blocking Portion of a Stopper

FIG. 5 illustrates an example of an interior view 500 of combined-purpose device 400 described in reference to FIG. 4. Components of combined-purpose device 400 can have, but are not limited to, the same characteristic and/or configuration variations of similar components of other combined-purpose devices and/or systems described herein. The combined-purpose device 400 should not be limited to what is described herein. The combined-purpose device 400 can have fewer or more components with other variations than those described herein.

The blocking portion 502 can be the blocking portion described in reference to FIG. 4. The blocking portion 502 can be coupled to extension portion 412 of stopper 418, on the opposing side of grasping portion 414. The blocking portion 502 can be made from a variety of materials. In some embodiments, the blocking portion 502 is made from silicone. Silicone can be advantageous because the blocking portion 502, when in the closed position, can deform upon interfacing with an ejector inlet. The deformation of the blocking portion 502 can facilitate creating contact between the blocking portion 502 and ejector inlet such that fluid is obstructed from entering the ejector inlet. Silicone can also be advantageous because it can be chemically inert, a desirable quality when pumping fluids used for a bathing environment. Silicone can also advantageous because, despite being able to deform (elastic), it is durable. Durability can be advantageous so that the blocking portion 502 does not have to be regularly replaced. The blocking portion 502 can be comprised of other materials such as rubbers, resins, and/or other polymers. In some embodiments, the blocking portion 502 can be comprised of other materials such as metals, metal alloys, and/or others.

The blocking portion 502 can be varying shapes and sizes. In some embodiments, the blocking portion 502 is a sphere, cylinder, cone, prism, polygon, or other shape. In some embodiments, the blocking portion 502 is a portion of a shape and/or combination of shapes.

In some embodiments, the blocking portion 502 has a main portion that is shaped and sized to partially or fully enter into an ejector inlet. In some embodiments, the main portion can have a cavity that allows the blocking portion 502 to deflect to a greater degree when interfacing with the ejector inlet. This deflection can facilitate forming contact between the blocking portion 502 and the ejector inlet that completely or substantially obstructs fluid from entering the ejector inlet. In some embodiments, the main body can have an annular projection that surrounds the portion of the main body closest to the extension portion 412. The annular projection can have a variety of cross-sections. In some embodiments, the cross-section can be a circle, polygon, oval, or other shape. In some embodiments, the cross-section can be a portion of a shape. For example, the cross-section can be a semi-circle. In some embodiments, the annular projection can make contact with the interior perimeter of ejector inlet when stopper 418 is in the closed position. In some embodiments, the annular projection can make contact with the portion of the ejector assembly that surrounds the ejector inlet when stopper 418 is in the closed position.

In some embodiments, the blocking portion 502 can have a main portion that has a cone-like shape that is configured to partially or fully enter into an ejector inlet. In some embodiments, the cone-like shape can have a cavity. The cavity can allow the blocking portion 502 to deflect to a greater degree when interfacing with the ejector inlet. In some embodiments, the cone-like shape can have an annular projection that surrounds the base of the cone-like portion. In some embodiments, the cross-section of the annular projection is circular. In some embodiments, the cone-like shape can be inserted into the ejector inlet and the annular projection with a circular cross section can make contact with the portion of the ejector assembly that surrounds the ejector inlet when stopper 418 is in the closed position. This can obstruct fluid from entering an ejector inlet.

Example Solenoid Operated Plug

FIG. 6 illustrates an example of a combined-purpose device 600. Components of combined-purpose device 600 can have, but are not limited to, the same characteristic and/or configuration variations of similar components of other combined-purpose devices and/or systems described herein. The combined-purpose device 600 should not be limited to what is described herein. The combined-purpose device 600 can have fewer or more components with other variations than those described herein.

The combined-purpose device 600 can include a pump casing 604. The pump casing 604 can include an inlet 602 through which fluid can enter the pump casing 604. The pump casing 604 can include an ejector access port 606. A plug, or a portion of a plug, can be positioned within the ejector access port 606. In some embodiments, the plug can slide linearly between closed, open, and intermediary positions. In some embodiments, the plug can rotate between closed, open, and intermediary positions. In some embodiments, an automatic solenoid 608 can move a plug between different positions. The automatic solenoid 608 can be powered by power supply 610.

In some embodiments, a user can select between the closed, open, and/or intermediary positions using a user interface. Based on the user input, a controller can command the automatic solenoid 608 to move to a selected position (select different modes). In some embodiments, a user can select that the automatic solenoid 608 keep the plug in a given position for a given period of time. Based on the user input, a controller can command the automatic solenoid 608 to keep the plug in a given position for a given period of time.

Example Solenoid Operated Plug

FIG. 7 is illustrates an example of a combined-purpose device 700. Components of combined-purpose device 700 can have, but are not limited to, the same characteristic and/or configurations variations of similar components of other combined-purpose devices and/or systems described herein. The combined-purpose device 700 should not be limited to what is described herein. The combined-purpose device 700 can have fewer or more components with other variations than those described herein.

The combined-purpose device 700 can include a pump casing 704. The pump casing 704 can include an inlet 702 through which fluid can enter the pump casing 704. The inlet 702 can be connected to piping 710. The pump casing 704 can include an ejector access port 706. A plug, or a portion of a plug, can be positioned within the ejector access port 706. In some embodiments, the plug can slide linearly between closed, open, and intermediary positions. In some embodiments, the plug can rotate between closed, open, and intermediary positions. In some embodiments, a solenoid 708 can move the plug between different positions.

Example Cross-Section View of Combined-Purpose Device with Plug in Open Position

FIG. 8 illustrates an example of a cross-section view of a combined-purpose device 800 with the plug 822 (e.g., stopper) in an open position. Components of combined-purpose device 800 can have, but are not limited to, the same characteristic and/or configuration variations of similar components of other combined-purpose devices and/or systems described herein. The combined-purpose device 800 should not be limited to what is described herein. The combined-purpose device 800 can have fewer or more components with other variations than those described herein.

The combined-purpose device 800 can include a pump casing 824. The pump casing 824 can include an inlet 802 through which fluid can enter the pump casing 824. The pump casing 824 can include an inlet 802 through which fluid can enter the internal cavity of pump casing 824. The inlet 802 can be fluidically coupled or connected to an ejector primary opening 826 of an ejector assembly 806. The ejector primary opening 826 can be fluidically connected to an inner tube 811 of an ejector assembly 806. The ejector assembly 806 can have an ejector inlet 808 and ejector outlet 810 which are fluidically connected by the tube or inner tube 811 of ejector assembly 806. The ejector assembly 806 can cause a high flow pressure drop when fluid passes through the ejector inlet 808, inner tube 811 of ejector assembly 806, and ejector outlet 810.

The inner tube 811 can have a tube inlet 813 and a tube outlet 815. The inner diameter of the tube inlet 813 can be larger than the inner diameter of the tube outlet 815 or the inner diameter proximate the tube outlet 815. The fluid at a relatively high pressure can be directed from the impeller toward the tube inlet 813 by the pump casing. The fluid passes through tube inlet 813 toward the tube outlet 815 and increases in velocity while dropping in the pressure. The tube outlet 815 is in fluid communication with the ejector primary opening 826 to drawn fluid into the ejector primary opening 826.

The tube outlet 815 can be in fluid communication with, direct fluid into, and/or open up into a fluid passageway 817 of the ejector assembly 806. The fluid passageway 817 can direct the fluid toward the impeller 812. In some embodiment, the fluid passageway 817 can be considered the elongate tube as discussed herein. In some embodiments, any portion or all of the fluid passageway 817 and any portion or all of the inner tube 811 can be considered the elongate tube as discussed herein. In some embodiments, a portion or all of the tube outlet 815 can be connected to the fluid passageway 817. The venturi effect can be considered to be created by the inner tube 811 with or without the fluid passageway 817. The inner tube 811 with or without the fluid passageway 817 can be considered a venturi device having an inlet and an outlet as discussed herein. Accordingly, the venturi inlet can be the ejector inlet 808 and/or the tube inlet 813. The venturi outlet can be the ejector outlet 810 or the tube outlet 815.

The ejector outlet 810 can be positioned in close proximity to impeller 812, such that fluid exiting ejector outlet 810 can be directed toward impeller center 814. Impeller 812 can be coupled to motor 820 such that the motor 820 can rotate a shaft, causing the rotation of impeller 812. The rotation of impeller 812 can direct fluid toward the impeller center 814 of impeller 812 and then toward the periphery of impeller 812. Fluid can be directed from the periphery of impeller 812 to area 816 and/or the area 818, which can be areas of one internal chamber defined by the pump casing 824 or separate areas partitioned by walls of the pump casing 824. The entire inside of the pump casing 824, including areas 816 and 818, can be at the same pressure or, in some embodiments, different pressures. The entire inside of the pump casing 824, including areas 816, 818 and the outlet 804, can be at the same pressure or, in some embodiments, different pressures.

The pump casing 824 can include an ejector access port 828. A plug 822, also referred to as a stopper or obstruction mechanism, can be coupled, inserted within, and/or connected to ejector access port 828. The plug 822 can have a length that is configured to extend from ejector access port 828 to ejector inlet 808 and/or tube inlet 813. The plug 822 can be actuated between different positions, which can include an open position, closed position, and/or intermediary positions. In the closed position, the plug 822 is actuated to obstruct ejector inlet 808 and/or tube inlet 813 such that fluid cannot flow from area 816 into the ejector assembly 806. In the open position, as is depicted in FIG. 8, the plug 822 is actuated to not obstruct ejector inlet 808 and/or tube inlet 813 such that fluid can flow from the area 816, and/or other areas, and into the ejector assembly 806 via the ejector inlet 808 and/or tube inlet 813. In an intermediary position, the plug 822 is actuated to partially obstruct ejector inlet 808 such that fluid can flow from area 816 and into the ejector assembly 806 but at a lower flow rate compared to the open position. The plug 822 can be actuated manually and/or automatically between different positions. In some embodiments, plug 822 is actuated automatically with a solenoid.

In operation, the motor 820 can rotate a shaft, causing the impeller 812 to rotate. The rotation of impeller 812 can pull fluid through inlet 802. In some embodiment, the fluid pulled in through inlet 802 is low pressure fluid. The fluid can flow through the inlet 802 to the ejector primary opening 826, through the fluid passageway 817 of the ejector assembly 806, and out the ejector outlet 810. The rotating impeller 812 can pull fluid toward the impeller center 814 and then direct the fluid toward a periphery of impeller 812.

As depicted in FIG. 8, when the plug 822 is in the open position and not obstructing the ejector inlet 808, the fluid can flow in at least two directions from the periphery of impeller 812. A portion of fluid can be directed toward area 818 and exit pump casing 824 through outlet 804, which may be connected to a bathing environment or piping that leads to a bathing environment. A portion of fluid can be directed toward area 816 and be recirculated by flowing into ejector inlet 808 (tube inlet 813 of tube 811), accelerated through the tube outlet 815 (causing a pressure drop and entrainment of fluid into the inlet 802 of the pump casing 824), through the fluid passageway 817, or the inner tube of ejector assembly 806, and out the ejector outlet 810, causing a high flow pressure drop.

In some embodiments, fluid passing through the fluid passageway 817, or the inner tube of the ejector assembly 806, is at a medium pressure. The fluid at the inlet 802 can be considered relatively low pressure. The fluid at the impeller periphery can be considered relatively high pressure. Due to this high flow pressure drop, fluid can be drawn in from inlet 802. This can contribute to a significant pressure boost. In some embodiments, the pressure boost can be in the range of raising pressure to 45-50 PSI. In some embodiments, the fluid exiting outlet 804 can exit at 35-45 PSI. In some embodiments, the fluid exiting outlet 804 can exit at 5-60 PSI and 3-100 GPM. Given the significant pressure boost and reduced flow from the recirculated fluid, the portion of fluid entering the area 818 can be high pressure and can exit outlet 804 at a high pressure and low flow rate. In some embodiments, the fluid exiting outlet 804 can exit at 45-50 PSI and approximately 3 GPM or less. This can produce flow rates and pressures that are desirable and/or necessary for producing microbubbles, with additional auxiliary equipment, that are fed into a bathing environment. In some embodiments, recirculated fluid that is directed from the impeller center 814 and then to the periphery of impeller 812 can enter area 816 at a high pressure. In some embodiments, the recirculated fluid can enter ejector inlet 808 at a high pressure. In some embodiments, this can include the pressure range of 45-50 PSI.

Example Cross-Section View of Combined-Purpose Device with Plug in Closed Position

FIG. 9 illustrates an example of a cross-section view of combined-purpose device 800 with the plug 822 (e.g., stopper) in a closed position. Components of combined-purpose device 800 can have, but are not limited to, the same characteristic and/or configuration variations of similar components of other combined-purpose devices and/or systems described herein. The combined-purpose device 800 should not be limited to what is described herein. The combined-purpose device 800 can have fewer or more components with other variations than those described herein.

In operation, the motor 820 can rotate a shaft, causing the impeller 812 to rotate. The rotation of impeller 812 can pull fluid through inlet 802. In some embodiment, the fluid pulled in through inlet 802 is low pressure fluid. The fluid can flow through the inlet 802 to the ejector primary opening 826, through the passageway 817, or inner tube of the ejector assembly 806, and out the ejector outlet 810. The rotating impeller 812 can pull fluid toward the impeller center 814 and then direct the fluid toward a periphery of impeller 812.

As depicted in FIG. 9, when the plug 822 is in the closed position and obstructing the ejector inlet 808, fluid cannot flow through ejector inlet 808 and/or tube inlet 813 and through ejector assembly 806. The fluid can flow in at least at least two directions from the periphery of impeller 812. A portion of fluid can be directed toward area 818 and exit pump casing 824 through outlet 804, which can be connected to a bathing environment or piping that leads to a bathing environment. A portion of fluid can be directed toward area 816, but fluid will not be recirculated through the tube 811, fluid passageway 817, and/or the inner tube of ejector assembly 806 because plug 822 is obstructing fluid from entering ejector inlet 808 and/or tube inlet 813. Consequently, there is no associated pressure boost from recirculated fluid passing through ejector assembly 806. In some embodiments, the rotation of impeller 812 can change the pressure and flow rate of fluid. In some embodiments, the fluid leaving the periphery of impeller 812, to either area 818 or area 816, can be at a medium pressure. The fluid drawn through inlet 802 and through fluid passageway 817, or inner tube of the ejector assembly 806, and into the impeller can be considered low pressure. In some embodiments, the fluid leaving the periphery of impeller 812 to the area 816, area 818, and/or outlet 804 can be at a lower pressure and higher flow rate relative to when plug 822 is in the open position. In some embodiments, the fluid leaving the periphery of the impeller 812 to the area 816, area 818, and/or outlet 804 can be at a medium pressure and higher flow rate relate to when the plug 822 is in the open positon. In some embodiments, this can include fluid exiting outlet 804 at 10 PSI and 40 GPM or more. This can include standard pressure and flow rates that are used for whirl pool jets in bathing environments. In some embodiments, the fluid exiting outlet 216 can exit at 5-60 PSI and 3-100 GPM.

When the plug 822 is in an intermediary position, partially obstructing the ejector inlet 808, the fluid can recirculate through the ejector inlet 808 and/or tube inlet 813 of the ejector assembly 806 but at reduced levels compared to the open position because less fluid can pass through the ejector assembly 806. This can result in a reduced pressure boost and flow loss. Consequently, the fluid exiting outlet 804 can have pressure and flow rates between what can occur when the plug 822 is in the open or closed positions. In some embodiments, the fluid exiting outlet 804 can exit at 10-45 PSI and 3-40 GPM when plug 822 is in an intermediary position. In some embodiments, the fluid exiting outlet 216 can exit at 5-60 PSI and 3-100 GPM.

Example Cross-Section View of a Portion of a Combined Purpose Device

FIG. 10 illustrates an example of a cross-section view of a portion of a combined-purpose device 1000. Components of combined-purpose device 1000 can have, but are not limited to, the same characteristic and/or configuration variations of similar components of other combined-purpose devices and/or systems described herein. The combined-purpose device 1000 should not be limited to what is described herein. The combined-purpose device 1000 can have fewer or more components with other variations than those described herein.

Combined-purpose device 1000 can have an inlet 1002, which can be fluidically coupled to an intake pipe and/or vessel. Inlet 1002 can be fluidically coupled to a diffuser opening 1004. The diffuser opening 1004 can be fluidically coupled to a suction chamber 1006. Suction chamber 1006 can be fluidically coupled to an ejector 1008. The suction chamber 1006 can be fluidically coupled to the ejector 1008 such that fluid passing through the suction camber 1006 will not pass through an actuating nozzle 1010 of ejector 1008.

Ejector 1008 can have an actuating nozzle 1010, which can be disposed on one end of the ejector 1008. Actuating nozzle 1010 can be fluidically coupled to an inner tube 1012 of ejector 1008. Inner tube 1012 of ejector 1008 can be fluidically coupled to a diffuser 1014, which can be disposed on an end of the ejector 1008 that is opposite the actuating nozzle 1010. In some embodiments, actuating nozzle 1010 can be fluidically coupled to diffuser 1014. In some embodiments, the components of ejector 1008 are positioned in a piping system such that they are not directly coupled to each other.

The combined-purpose device 1000 can function as the other combined-purpose devices disclosed herein, including having a plug, or other obstruction mechanism, that can be positioned in an open, closed, and intermediary position to obstruct fluid from recirculating through the actuating nozzle 1010. Combined-purpose device 1000 can operate to alter the pressure and flow of fluid flowing through the combined-purpose system 1100 as described herein.

Example of a Combined-Purpose System

FIG. 11 illustrates an example of a combined-purpose system 1100. Components of combined-purpose system 1100 can have, but are not limited to, the same characteristic variations of similar components of other combined-purpose devices and systems described herein. The combined-purpose system 1100 should not be limited to what is described herein. The combined-purpose system 1100 can have fewer or more components with other variations than those described herein.

Combined-purpose system 1100 can have a pump 1102. Pump 1102 can have an impeller 1104. Pump 1102 can be configured to rotate impeller 1102 such that fluid is pulled from intake pipe 1106. Intake pipe (tube, first pipe) 1106 can have an intake opening (inlet, tube inlet) 1110 that is fluidically coupled to a venturi 1108 that is disposed within piping. The intake opening 1110 can be positioned such that fluid passing through the intake opening 1110 will not pass through an actuating nozzle 1116 of the venturi 1108. The venturi 1108 can have a diffuser 1112. The diffuser 1112 can be fluidically coupled to a chamber 1105 that houses the impeller 1104. The diffuser 1112 can be fluidically coupled to piping or suction piping 1115 that is fluidically coupled to the chamber 1105 that houses the impeller 1104.

Outlet piping (outlet, tube outlet) 1120 can be fluidically connected to the chamber 1105 that houses the impeller 1104. Recirculation piping (fluid passageway, second pipe) 1114 can be fluidically connected to the chamber 1105 that houses the impeller 1104. Recirculation piping 1114 can be fluidically coupled to the actuating nozzle 1116 of the venturing 1118, such that fluid entering the recirculation piping 1114 will pass through the venturi 1108 and back to the chamber 1105 that houses the impeller 1102. An obstruction mechanism (flow controller) 1118 can be disposed on and/or within the recirculation piping 1114. The obstruction mechanism 1118 can be a valve, plug, stopper, and or other obstruction device. The obstruction mechanism 1118 can obstruct fluid from flowing through the recirculation piping 1114. The obstruction mechanism 1118 can be actuated between a closed, open, and intermediate positions, as disclosed herein to provide a variable flow rate, including no flow rate, through recirculation piping 1114.

Combined-purpose system 1100 can operate as the combined-purpose devices and systems disclosed herein to alter the pressure and flow of fluid flowing through the combined-purpose system 1100 and connected piping. In some embodiments, the intake opening 1110 can be considered the inlet 802. In some embodiments, the diffuser 1112, recirculation piping 1114, and/or actuating nozzle 1116, can be considered the tube 811. In some embodiments, the diffuser 1112 and/or suction pipe 1115 can be considered the fluid passageway 817. In some embodiments, the intake opening 1110, the diffuser 1112, recirculation piping 1114, actuating nozzle 1116, and/or suction pipe 1115 can be considered an ejector assembly. In some embodiments, the obstruction mechanism 1118 can be considered the plug 822.

In some embodiments, the combined-purpose system 1100 can include multiple venturis 1108. In some embodiments, multiple venturis 1108 can be staged. In some embodiments, multiple venturis 1108 can be positioned in series. In some embodiments, multiple venturis 1108 can be positioned in parallel. In some embodiments, multiple venturis 1108 can share an actuating nozzle 1116. In some embodiments, multiple venturis 1108 can each have an actuating nozzle 1116 but all, or some, share a diffuser 1112 

What is claimed is:
 1. A centrifugal pump for directing fluid, the centrifugal pump comprising: a casing configured to direct a fluid through the casing; an inlet opening configured to direct the fluid into the casing; an outlet opening configured to direct the fluid out of the casing; an impeller positioned in the casing, the impeller configured to direct the fluid from the inlet opening to the outlet opening by directing fluid from a center of the impeller to a periphery of the impeller; a motor configured to rotate the impeller to cause the impeller to direct the fluid from the inlet opening to the outlet opening; a venturi device comprising a venturi inlet and a venturi outlet, the venturi device configured to recirculate at least a portion of the fluid in the casing from the periphery of the impeller via the venturi inlet back toward the center of the impeller via the venturi outlet, wherein the venturi outlet is in fluid communication with the inlet opening, and wherein the venturi device is configured to increase fluid flow rate from the venturi inlet directed to the venturi outlet to decrease pressure of the at least a portion of the fluid directed to the venturi outlet to draw fluid through the inlet opening; and a plug configured to selectively move from an open position to a closed position, wherein in the open position, the at least a portion of the fluid is recirculated in the casing through the venturi device, and wherein in the closed position, the plug is configured to inhibit recirculation flow through the venturi device to inhibit recirculation of the at least a portion of the fluid in the casing, wherein with the plug in the open position, the centrifugal pump is configured to provide a lower fluid flow rate at a higher fluid pressure relative to with the plug in the closed position, wherein with the plug in the closed position, the centrifugal pump is configured to provide a higher fluid flow rate at a lower fluid pressure relative to with the plug in the open position.
 2. The centrifugal pump of claim 1, wherein the plug is configured to be selectively moved to one or more positions between the open position and the closed position to vary fluid flow rate through the venturi device and provide a range of fluid flow rates and fluid pressures for fluid exiting the outlet opening, ranging from the lower fluid flow rate and the higher fluid pressure in the open position to the higher fluid flow rate and the lower fluid pressure in the closed position.
 3. The centrifugal pump of claim 1, wherein with the plug in the open position, the centrifugal pump is configured to provide a fluid flow rate of about 3 GPM at a fluid pressure of about 35 to 45 PSI, and wherein with the plug in the closed position, the centrifugal pump is configured to provide a fluid flow rate of about 40 GPM at a fluid pressure of about 10 PSI.
 4. The centrifugal pump of claim 1, wherein the plug comprises an actuator configured to move the plug from the open position to the closed position.
 5. The centrifugal pump of claim 1, wherein the plug is configured to be moved manually or automatically.
 6. The centrifugal pump of claim 1, wherein the plug comprises a silicone stopper configured to at least partially conform to the venturi inlet to block the venturi inlet.
 7. A pump casing assembly configured to direct fluid, the pump casing assembly comprising: an inlet opening configured to direct a fluid through the pump casing assembly; an outlet opening configured to direct the fluid out of the pump casing assembly; an impeller positioned in the pump casing assembly, the impeller configured to direct the fluid from the inlet opening to the outlet opening; an ejector assembly, wherein the ejector assembly comprises a tube inlet and a tube outlet, wherein an intermediary inner diameter of the ejector assembly, disposed between the tube inlet and tube outlet, is smaller than an inner diameter of the tube inlet and an inner diameter of the tube outlet, wherein the ejector assembly is configured to recirculate at least a portion of the fluid in the pump casing assembly, wherein the tube outlet is in fluid communication with the tube inlet, and wherein the ejector assembly is configured to increase fluid flow rate from the tube inlet directed to the tube outlet to decrease pressure of the at least a portion of the fluid directed to the tube outlet to draw fluid into the inlet opening; and a stopper configured to selectively move from an open position, allowing fluid to be recirculated in the pump casing assembly through the ejector assembly, and a closed position, inhibiting recirculation flow through the ejector assembly to inhibit recirculation of the at least a portion of the fluid in the pump casing assembly, wherein with the stopper in the open position, the pump casing assembly is configured to provide a lower fluid flow rate at a higher fluid pressure relative to the stopper in the closed position, wherein the pump casing assembly is configured to provide a higher fluid flow rate at a lower fluid pressure.
 8. The pump casing assembly of claim 7, wherein the impeller is configured to direct the fluid from the inlet opening to the outlet opening by generally directing fluid from a center of the impeller to a periphery of the impeller.
 9. The pump casing assembly of claim 7, wherein the pump casing assembly comprises a motor configured to rotate the impeller to direct the fluid from the inlet opening to the outlet opening.
 10. The pump casing assembly of claim 7, wherein the passage of fluid through the ejector assembly has a venturi effect.
 11. The pump casing assembly of claim 7, wherein an inner diameter of the ejector assembly gradually decreases in size from the inner diameter of the tube inlet to the intermediary inner diameter, and wherein the inner diameter of the ejector assembly gradually increases in size from the intermediary inner diameter to the inner diameter of the tube outlet.
 12. The pump casing assembly of claim 7, wherein the ejector assembly is configured to recirculate at least a portion of the fluid in the pump casing assembly from a periphery of the impeller via the tube inlet back toward a center of the impeller via the tube outlet.
 13. The pump casing assembly of claim 7, wherein the stopper is configured to be selectively moved to one or more positions between the open position and the closed position to vary fluid flow rate through the ejector assembly and provide a range of fluid flow rates and fluid pressures for fluid exiting the outlet opening, ranging from the lower fluid flow rate and the higher fluid pressure in the open position to the higher fluid flow rate and the lower fluid pressure in the closed position.
 14. The pump casing assembly of claim 7, wherein with the stopper in the open position, the pump casing assembly is configured to provide a fluid flow rate of about 3 GPM at a fluid pressure of about 35 to 45 PSI.
 15. The pump casing assembly of claim 7, wherein with the stopper in the closed position, the pump casing assembly is configured to provide a fluid flow rate of about 40 GPM at a fluid pressure of about 10 PSI.
 16. The pump casing assembly of claim 7, wherein the stopper comprises an actuator configured to move the stopper between the open, closed, and intermediary positions.
 17. An ejector assembly configured to direct fluid, the ejector assembly comprising: a tube or first pipe including a tube inlet and a tube outlet; a fluid passageway or second pipe fluidly connecting the tube outlet to the tube inlet to recirculate fluid, wherein an inner diameter of the tube is smaller than an inner diameter of the fluid passageway; and a flow controller configured to selectively move from an open position, allowing fluid flow into the tube inlet to recirculate through the ejector assembly, and a closed position, inhibiting recirculation fluid flow in the tube inlet and through the tube to inhibit recirculation of the fluid, wherein the tube is configured to increase fluid flow rate from the tube inlet to the tube outlet to decrease pressure of the fluid directed through the tube.
 18. The ejector assembly of claim 17, wherein passage of fluid through the ejector assembly has a venturi effect.
 19. The ejector assembly of claim 17, further comprising an actuator configured to move the flow controller between the open, closed, and intermediary positions.
 20. The ejector assembly of claim 17, wherein the flow controller comprises a valve. 